To my untrained (and possibly uninformed) eye, they look like they're targeting the low-end drift market or more likely the Japanese youth street market (where kids want a simple and cheap modification to make their car oversteer on the street). They're simple low-cost dampers with the only obvious standout being that they have an unusually high rear spring rate relative to the front. I'm puzzled by the minimal 10mm drop, but I don't know the first thing about the drift market.
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Mr.Impreza what exactly are you trying to achieve with your car and what did you find attractive about this kit?